市面常见的鉴权方式有两种,一种是基于session,另一种是基于token方式的鉴权,我们来浅谈一下两种 鉴权方式的区别。



  1. 安全性:session是基于cookie进行用户识别的,cookie如果被截获,用户很容易受到跨站请求伪造的攻击。
  2. 扩展性:session是有状态的,是具有IP黏贴性和有中心化特性的,在分布式环境下,虽然每台服务器业务逻辑一样,但是session是保存在各个服务器中的,而且每个服务器内存是不共享的,如果使用session去实现分布式部署的话,需要使用其他的一些技术手段去实现,比如spring session,将session保存在第三方服务中,比如redis,这样一旦第三方服务出现问题,整个验权系统就会奔溃,在电商系统及高并发系统中的集群化处理显然是不合适的。
  3. 抗压能力:通常session是存储在内存中的,每个用户通过认证后都会将session存储在服务器内存中,当用户量增大的情况下服务器的压力也随之增大。


  1. 安全性:浏览器会将接收到的token值存储在Local Storage中,(通过js代码写入Local Storage,通过js获取,并不会像cookie一样自动携带)
  2. 扩展性:token是无状态的,是去中心化的,在分布式环境下,各个服务器中的服务只对token进行数据查询,它不需要在服务端保留用户信息或者会话信息,这意味着用户不需要考虑登录的是哪一台服务器,高效的解决了session扩展性的弊端。
  3. 抗压能力:token与session的不同主要在认证成功后,会对当前用户数据进行加密,生成一个加密字符串token,返还给客户端(服务器端并不进行保存)



Javashop电商系统 采用的是oauth方式的鉴权标准。以下是javashop电商系统对于token鉴权架构的详解。

  1. 登录
  2. 访问API
    在访问API之前解析access_token,并且查看是否过期,如果不过 期则请求API,如果过期,则要刷新令牌,在请求API。
  3. 刷新token
  4. 注销


  1. 客户端请求API
  2. 获取token
  3. 解析token
  4. 由redis读取token
    根据uid拼接key读取access_token, 如果不存在这个用户的token说明已经登出。
  5. 验证token
  6. 注入权限


  1. 客户端请求API
  2. 获取token
  3. 解析token
  4. token读取
  5. 验证token
  6. 刷新token
    如果refresh_token 验证成功,则重新生成access_token和refresh_token,上述有效期以当前时间向后计算,替换此用户在redis中的token,并将token返回给客户端。


一、 参数的读取

  1. 在生产环境时,不能直接传递token,而是要传递签名数据,服务器端验签后由Redis中获取签名。
  2. 如果是非生产环境,直接由header中读取token。
    二、 生产环境传递如下参数
    memberid (用户id)
    sign= md5( uid+ nonce + timestamp +token )
    三、 验证逻辑
  3. 验证时间戳
  4. 验证nonce
    首先验证nonce在 reids中是否存在,如果存在,则判别为重放功击,否则将nonce记录在redis中(key为:”nonce”+uid+”_”+nonce),失效时间为60s。
  5. 验证sign
    md5( uid+ nonce + timestamp +token ) 验证是签名是否通过。
  6. 验证token
    通过uid拿到token ,验证逻辑同验权流程。
  • 当然在不同的业务场景下实现方案是多种多样的,仅以此方案抛转引玉,供大家参考。


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